DIFF Main Group Additional Only
F01N 2240/00 Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
Of 20 combined children, 0 exist in both systems.
20 codes are CPC-only extensions.
Note: 20 CPC extensions are marked as secondary classification only.